1 /* 2 * Copyright 2002-2005, Instant802 Networks, Inc. 3 * Copyright 2005-2006, Devicescape Software, Inc. 4 * Copyright 2006-2007 Jiri Benc <jbenc@suse.cz> 5 * 6 * This program is free software; you can redistribute it and/or modify 7 * it under the terms of the GNU General Public License version 2 as 8 * published by the Free Software Foundation. 9 */ 10 11 #include <net/mac80211.h> 12 #include <linux/module.h> 13 #include <linux/init.h> 14 #include <linux/netdevice.h> 15 #include <linux/types.h> 16 #include <linux/slab.h> 17 #include <linux/skbuff.h> 18 #include <linux/etherdevice.h> 19 #include <linux/if_arp.h> 20 #include <linux/rtnetlink.h> 21 #include <linux/bitmap.h> 22 #include <linux/pm_qos.h> 23 #include <linux/inetdevice.h> 24 #include <net/net_namespace.h> 25 #include <net/cfg80211.h> 26 #include <net/addrconf.h> 27 28 #include "ieee80211_i.h" 29 #include "driver-ops.h" 30 #include "rate.h" 31 #include "mesh.h" 32 #include "wep.h" 33 #include "led.h" 34 #include "cfg.h" 35 #include "debugfs.h" 36 37 void ieee80211_configure_filter(struct ieee80211_local *local) 38 { 39 u64 mc; 40 unsigned int changed_flags; 41 unsigned int new_flags = 0; 42 43 if (atomic_read(&local->iff_promiscs)) 44 new_flags |= FIF_PROMISC_IN_BSS; 45 46 if (atomic_read(&local->iff_allmultis)) 47 new_flags |= FIF_ALLMULTI; 48 49 if (local->monitors || test_bit(SCAN_SW_SCANNING, &local->scanning) || 50 test_bit(SCAN_ONCHANNEL_SCANNING, &local->scanning)) 51 new_flags |= FIF_BCN_PRBRESP_PROMISC; 52 53 if (local->fif_probe_req || local->probe_req_reg) 54 new_flags |= FIF_PROBE_REQ; 55 56 if (local->fif_fcsfail) 57 new_flags |= FIF_FCSFAIL; 58 59 if (local->fif_plcpfail) 60 new_flags |= FIF_PLCPFAIL; 61 62 if (local->fif_control) 63 new_flags |= FIF_CONTROL; 64 65 if (local->fif_other_bss) 66 new_flags |= FIF_OTHER_BSS; 67 68 if (local->fif_pspoll) 69 new_flags |= FIF_PSPOLL; 70 71 spin_lock_bh(&local->filter_lock); 72 changed_flags = local->filter_flags ^ new_flags; 73 74 mc = drv_prepare_multicast(local, &local->mc_list); 75 spin_unlock_bh(&local->filter_lock); 76 77 /* be a bit nasty */ 78 new_flags |= (1<<31); 79 80 drv_configure_filter(local, changed_flags, &new_flags, mc); 81 82 WARN_ON(new_flags & (1<<31)); 83 84 local->filter_flags = new_flags & ~(1<<31); 85 } 86 87 static void ieee80211_reconfig_filter(struct work_struct *work) 88 { 89 struct ieee80211_local *local = 90 container_of(work, struct ieee80211_local, reconfig_filter); 91 92 ieee80211_configure_filter(local); 93 } 94 95 static u32 ieee80211_hw_conf_chan(struct ieee80211_local *local) 96 { 97 struct ieee80211_sub_if_data *sdata; 98 struct cfg80211_chan_def chandef = {}; 99 u32 changed = 0; 100 int power; 101 u32 offchannel_flag; 102 103 offchannel_flag = local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 104 105 if (local->scan_chandef.chan) { 106 chandef = local->scan_chandef; 107 } else if (local->tmp_channel) { 108 chandef.chan = local->tmp_channel; 109 chandef.width = NL80211_CHAN_WIDTH_20_NOHT; 110 chandef.center_freq1 = chandef.chan->center_freq; 111 } else 112 chandef = local->_oper_chandef; 113 114 WARN(!cfg80211_chandef_valid(&chandef), 115 "control:%d MHz width:%d center: %d/%d MHz", 116 chandef.chan->center_freq, chandef.width, 117 chandef.center_freq1, chandef.center_freq2); 118 119 if (!cfg80211_chandef_identical(&chandef, &local->_oper_chandef)) 120 local->hw.conf.flags |= IEEE80211_CONF_OFFCHANNEL; 121 else 122 local->hw.conf.flags &= ~IEEE80211_CONF_OFFCHANNEL; 123 124 offchannel_flag ^= local->hw.conf.flags & IEEE80211_CONF_OFFCHANNEL; 125 126 if (offchannel_flag || 127 !cfg80211_chandef_identical(&local->hw.conf.chandef, 128 &local->_oper_chandef)) { 129 local->hw.conf.chandef = chandef; 130 changed |= IEEE80211_CONF_CHANGE_CHANNEL; 131 } 132 133 if (!conf_is_ht(&local->hw.conf)) { 134 /* 135 * mac80211.h documents that this is only valid 136 * when the channel is set to an HT type, and 137 * that otherwise STATIC is used. 138 */ 139 local->hw.conf.smps_mode = IEEE80211_SMPS_STATIC; 140 } else if (local->hw.conf.smps_mode != local->smps_mode) { 141 local->hw.conf.smps_mode = local->smps_mode; 142 changed |= IEEE80211_CONF_CHANGE_SMPS; 143 } 144 145 power = ieee80211_chandef_max_power(&chandef); 146 147 rcu_read_lock(); 148 list_for_each_entry_rcu(sdata, &local->interfaces, list) { 149 if (!rcu_access_pointer(sdata->vif.chanctx_conf)) 150 continue; 151 if (sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 152 continue; 153 power = min(power, sdata->vif.bss_conf.txpower); 154 } 155 rcu_read_unlock(); 156 157 if (local->hw.conf.power_level != power) { 158 changed |= IEEE80211_CONF_CHANGE_POWER; 159 local->hw.conf.power_level = power; 160 } 161 162 return changed; 163 } 164 165 int ieee80211_hw_config(struct ieee80211_local *local, u32 changed) 166 { 167 int ret = 0; 168 169 might_sleep(); 170 171 if (!local->use_chanctx) 172 changed |= ieee80211_hw_conf_chan(local); 173 else 174 changed &= ~(IEEE80211_CONF_CHANGE_CHANNEL | 175 IEEE80211_CONF_CHANGE_POWER); 176 177 if (changed && local->open_count) { 178 ret = drv_config(local, changed); 179 /* 180 * Goal: 181 * HW reconfiguration should never fail, the driver has told 182 * us what it can support so it should live up to that promise. 183 * 184 * Current status: 185 * rfkill is not integrated with mac80211 and a 186 * configuration command can thus fail if hardware rfkill 187 * is enabled 188 * 189 * FIXME: integrate rfkill with mac80211 and then add this 190 * WARN_ON() back 191 * 192 */ 193 /* WARN_ON(ret); */ 194 } 195 196 return ret; 197 } 198 199 void ieee80211_bss_info_change_notify(struct ieee80211_sub_if_data *sdata, 200 u32 changed) 201 { 202 struct ieee80211_local *local = sdata->local; 203 204 if (!changed || sdata->vif.type == NL80211_IFTYPE_AP_VLAN) 205 return; 206 207 drv_bss_info_changed(local, sdata, &sdata->vif.bss_conf, changed); 208 } 209 210 u32 ieee80211_reset_erp_info(struct ieee80211_sub_if_data *sdata) 211 { 212 sdata->vif.bss_conf.use_cts_prot = false; 213 sdata->vif.bss_conf.use_short_preamble = false; 214 sdata->vif.bss_conf.use_short_slot = false; 215 return BSS_CHANGED_ERP_CTS_PROT | 216 BSS_CHANGED_ERP_PREAMBLE | 217 BSS_CHANGED_ERP_SLOT; 218 } 219 220 static void ieee80211_tasklet_handler(unsigned long data) 221 { 222 struct ieee80211_local *local = (struct ieee80211_local *) data; 223 struct sk_buff *skb; 224 225 while ((skb = skb_dequeue(&local->skb_queue)) || 226 (skb = skb_dequeue(&local->skb_queue_unreliable))) { 227 switch (skb->pkt_type) { 228 case IEEE80211_RX_MSG: 229 /* Clear skb->pkt_type in order to not confuse kernel 230 * netstack. */ 231 skb->pkt_type = 0; 232 ieee80211_rx(&local->hw, skb); 233 break; 234 case IEEE80211_TX_STATUS_MSG: 235 skb->pkt_type = 0; 236 ieee80211_tx_status(&local->hw, skb); 237 break; 238 default: 239 WARN(1, "mac80211: Packet is of unknown type %d\n", 240 skb->pkt_type); 241 dev_kfree_skb(skb); 242 break; 243 } 244 } 245 } 246 247 static void ieee80211_restart_work(struct work_struct *work) 248 { 249 struct ieee80211_local *local = 250 container_of(work, struct ieee80211_local, restart_work); 251 252 /* wait for scan work complete */ 253 flush_workqueue(local->workqueue); 254 255 WARN(test_bit(SCAN_HW_SCANNING, &local->scanning), 256 "%s called with hardware scan in progress\n", __func__); 257 258 rtnl_lock(); 259 ieee80211_scan_cancel(local); 260 ieee80211_reconfig(local); 261 rtnl_unlock(); 262 } 263 264 void ieee80211_restart_hw(struct ieee80211_hw *hw) 265 { 266 struct ieee80211_local *local = hw_to_local(hw); 267 268 trace_api_restart_hw(local); 269 270 wiphy_info(hw->wiphy, 271 "Hardware restart was requested\n"); 272 273 /* use this reason, ieee80211_reconfig will unblock it */ 274 ieee80211_stop_queues_by_reason(hw, IEEE80211_MAX_QUEUE_MAP, 275 IEEE80211_QUEUE_STOP_REASON_SUSPEND, 276 false); 277 278 /* 279 * Stop all Rx during the reconfig. We don't want state changes 280 * or driver callbacks while this is in progress. 281 */ 282 local->in_reconfig = true; 283 barrier(); 284 285 schedule_work(&local->restart_work); 286 } 287 EXPORT_SYMBOL(ieee80211_restart_hw); 288 289 #ifdef CONFIG_INET 290 static int ieee80211_ifa_changed(struct notifier_block *nb, 291 unsigned long data, void *arg) 292 { 293 struct in_ifaddr *ifa = arg; 294 struct ieee80211_local *local = 295 container_of(nb, struct ieee80211_local, 296 ifa_notifier); 297 struct net_device *ndev = ifa->ifa_dev->dev; 298 struct wireless_dev *wdev = ndev->ieee80211_ptr; 299 struct in_device *idev; 300 struct ieee80211_sub_if_data *sdata; 301 struct ieee80211_bss_conf *bss_conf; 302 struct ieee80211_if_managed *ifmgd; 303 int c = 0; 304 305 /* Make sure it's our interface that got changed */ 306 if (!wdev) 307 return NOTIFY_DONE; 308 309 if (wdev->wiphy != local->hw.wiphy) 310 return NOTIFY_DONE; 311 312 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 313 bss_conf = &sdata->vif.bss_conf; 314 315 /* ARP filtering is only supported in managed mode */ 316 if (sdata->vif.type != NL80211_IFTYPE_STATION) 317 return NOTIFY_DONE; 318 319 idev = __in_dev_get_rtnl(sdata->dev); 320 if (!idev) 321 return NOTIFY_DONE; 322 323 ifmgd = &sdata->u.mgd; 324 sdata_lock(sdata); 325 326 /* Copy the addresses to the bss_conf list */ 327 ifa = idev->ifa_list; 328 while (ifa) { 329 if (c < IEEE80211_BSS_ARP_ADDR_LIST_LEN) 330 bss_conf->arp_addr_list[c] = ifa->ifa_address; 331 ifa = ifa->ifa_next; 332 c++; 333 } 334 335 bss_conf->arp_addr_cnt = c; 336 337 /* Configure driver only if associated (which also implies it is up) */ 338 if (ifmgd->associated) 339 ieee80211_bss_info_change_notify(sdata, 340 BSS_CHANGED_ARP_FILTER); 341 342 sdata_unlock(sdata); 343 344 return NOTIFY_OK; 345 } 346 #endif 347 348 #if IS_ENABLED(CONFIG_IPV6) 349 static int ieee80211_ifa6_changed(struct notifier_block *nb, 350 unsigned long data, void *arg) 351 { 352 struct inet6_ifaddr *ifa = (struct inet6_ifaddr *)arg; 353 struct inet6_dev *idev = ifa->idev; 354 struct net_device *ndev = ifa->idev->dev; 355 struct ieee80211_local *local = 356 container_of(nb, struct ieee80211_local, ifa6_notifier); 357 struct wireless_dev *wdev = ndev->ieee80211_ptr; 358 struct ieee80211_sub_if_data *sdata; 359 360 /* Make sure it's our interface that got changed */ 361 if (!wdev || wdev->wiphy != local->hw.wiphy) 362 return NOTIFY_DONE; 363 364 sdata = IEEE80211_DEV_TO_SUB_IF(ndev); 365 366 /* 367 * For now only support station mode. This is mostly because 368 * doing AP would have to handle AP_VLAN in some way ... 369 */ 370 if (sdata->vif.type != NL80211_IFTYPE_STATION) 371 return NOTIFY_DONE; 372 373 drv_ipv6_addr_change(local, sdata, idev); 374 375 return NOTIFY_OK; 376 } 377 #endif 378 379 /* There isn't a lot of sense in it, but you can transmit anything you like */ 380 static const struct ieee80211_txrx_stypes 381 ieee80211_default_mgmt_stypes[NUM_NL80211_IFTYPES] = { 382 [NL80211_IFTYPE_ADHOC] = { 383 .tx = 0xffff, 384 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 385 BIT(IEEE80211_STYPE_AUTH >> 4) | 386 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 387 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 388 }, 389 [NL80211_IFTYPE_STATION] = { 390 .tx = 0xffff, 391 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 392 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 393 }, 394 [NL80211_IFTYPE_AP] = { 395 .tx = 0xffff, 396 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 397 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 398 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 399 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 400 BIT(IEEE80211_STYPE_AUTH >> 4) | 401 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 402 BIT(IEEE80211_STYPE_ACTION >> 4), 403 }, 404 [NL80211_IFTYPE_AP_VLAN] = { 405 /* copy AP */ 406 .tx = 0xffff, 407 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 408 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 409 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 410 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 411 BIT(IEEE80211_STYPE_AUTH >> 4) | 412 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 413 BIT(IEEE80211_STYPE_ACTION >> 4), 414 }, 415 [NL80211_IFTYPE_P2P_CLIENT] = { 416 .tx = 0xffff, 417 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 418 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 419 }, 420 [NL80211_IFTYPE_P2P_GO] = { 421 .tx = 0xffff, 422 .rx = BIT(IEEE80211_STYPE_ASSOC_REQ >> 4) | 423 BIT(IEEE80211_STYPE_REASSOC_REQ >> 4) | 424 BIT(IEEE80211_STYPE_PROBE_REQ >> 4) | 425 BIT(IEEE80211_STYPE_DISASSOC >> 4) | 426 BIT(IEEE80211_STYPE_AUTH >> 4) | 427 BIT(IEEE80211_STYPE_DEAUTH >> 4) | 428 BIT(IEEE80211_STYPE_ACTION >> 4), 429 }, 430 [NL80211_IFTYPE_MESH_POINT] = { 431 .tx = 0xffff, 432 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 433 BIT(IEEE80211_STYPE_AUTH >> 4) | 434 BIT(IEEE80211_STYPE_DEAUTH >> 4), 435 }, 436 [NL80211_IFTYPE_P2P_DEVICE] = { 437 .tx = 0xffff, 438 .rx = BIT(IEEE80211_STYPE_ACTION >> 4) | 439 BIT(IEEE80211_STYPE_PROBE_REQ >> 4), 440 }, 441 }; 442 443 static const struct ieee80211_ht_cap mac80211_ht_capa_mod_mask = { 444 .ampdu_params_info = IEEE80211_HT_AMPDU_PARM_FACTOR | 445 IEEE80211_HT_AMPDU_PARM_DENSITY, 446 447 .cap_info = cpu_to_le16(IEEE80211_HT_CAP_SUP_WIDTH_20_40 | 448 IEEE80211_HT_CAP_MAX_AMSDU | 449 IEEE80211_HT_CAP_SGI_20 | 450 IEEE80211_HT_CAP_SGI_40 | 451 IEEE80211_HT_CAP_LDPC_CODING | 452 IEEE80211_HT_CAP_40MHZ_INTOLERANT), 453 .mcs = { 454 .rx_mask = { 0xff, 0xff, 0xff, 0xff, 0xff, 455 0xff, 0xff, 0xff, 0xff, 0xff, }, 456 }, 457 }; 458 459 static const struct ieee80211_vht_cap mac80211_vht_capa_mod_mask = { 460 .vht_cap_info = 461 cpu_to_le32(IEEE80211_VHT_CAP_RXLDPC | 462 IEEE80211_VHT_CAP_SHORT_GI_80 | 463 IEEE80211_VHT_CAP_SHORT_GI_160 | 464 IEEE80211_VHT_CAP_RXSTBC_1 | 465 IEEE80211_VHT_CAP_RXSTBC_2 | 466 IEEE80211_VHT_CAP_RXSTBC_3 | 467 IEEE80211_VHT_CAP_RXSTBC_4 | 468 IEEE80211_VHT_CAP_TXSTBC | 469 IEEE80211_VHT_CAP_SU_BEAMFORMER_CAPABLE | 470 IEEE80211_VHT_CAP_SU_BEAMFORMEE_CAPABLE | 471 IEEE80211_VHT_CAP_TX_ANTENNA_PATTERN | 472 IEEE80211_VHT_CAP_RX_ANTENNA_PATTERN | 473 IEEE80211_VHT_CAP_MAX_A_MPDU_LENGTH_EXPONENT_MASK), 474 .supp_mcs = { 475 .rx_mcs_map = cpu_to_le16(~0), 476 .tx_mcs_map = cpu_to_le16(~0), 477 }, 478 }; 479 480 static const u8 extended_capabilities[] = { 481 0, 0, 0, 0, 0, 0, 0, 482 WLAN_EXT_CAPA8_OPMODE_NOTIF, 483 }; 484 485 struct ieee80211_hw *ieee80211_alloc_hw(size_t priv_data_len, 486 const struct ieee80211_ops *ops) 487 { 488 struct ieee80211_local *local; 489 int priv_size, i; 490 struct wiphy *wiphy; 491 bool use_chanctx; 492 493 if (WARN_ON(!ops->tx || !ops->start || !ops->stop || !ops->config || 494 !ops->add_interface || !ops->remove_interface || 495 !ops->configure_filter)) 496 return NULL; 497 498 if (WARN_ON(ops->sta_state && (ops->sta_add || ops->sta_remove))) 499 return NULL; 500 501 /* check all or no channel context operations exist */ 502 i = !!ops->add_chanctx + !!ops->remove_chanctx + 503 !!ops->change_chanctx + !!ops->assign_vif_chanctx + 504 !!ops->unassign_vif_chanctx; 505 if (WARN_ON(i != 0 && i != 5)) 506 return NULL; 507 use_chanctx = i == 5; 508 509 /* Ensure 32-byte alignment of our private data and hw private data. 510 * We use the wiphy priv data for both our ieee80211_local and for 511 * the driver's private data 512 * 513 * In memory it'll be like this: 514 * 515 * +-------------------------+ 516 * | struct wiphy | 517 * +-------------------------+ 518 * | struct ieee80211_local | 519 * +-------------------------+ 520 * | driver's private data | 521 * +-------------------------+ 522 * 523 */ 524 priv_size = ALIGN(sizeof(*local), NETDEV_ALIGN) + priv_data_len; 525 526 wiphy = wiphy_new(&mac80211_config_ops, priv_size); 527 528 if (!wiphy) 529 return NULL; 530 531 wiphy->mgmt_stypes = ieee80211_default_mgmt_stypes; 532 533 wiphy->privid = mac80211_wiphy_privid; 534 535 wiphy->flags |= WIPHY_FLAG_NETNS_OK | 536 WIPHY_FLAG_4ADDR_AP | 537 WIPHY_FLAG_4ADDR_STATION | 538 WIPHY_FLAG_REPORTS_OBSS | 539 WIPHY_FLAG_OFFCHAN_TX; 540 541 wiphy->extended_capabilities = extended_capabilities; 542 wiphy->extended_capabilities_mask = extended_capabilities; 543 wiphy->extended_capabilities_len = ARRAY_SIZE(extended_capabilities); 544 545 if (ops->remain_on_channel) 546 wiphy->flags |= WIPHY_FLAG_HAS_REMAIN_ON_CHANNEL; 547 548 wiphy->features |= NL80211_FEATURE_SK_TX_STATUS | 549 NL80211_FEATURE_SAE | 550 NL80211_FEATURE_HT_IBSS | 551 NL80211_FEATURE_VIF_TXPOWER | 552 NL80211_FEATURE_USERSPACE_MPM; 553 554 if (!ops->hw_scan) 555 wiphy->features |= NL80211_FEATURE_LOW_PRIORITY_SCAN | 556 NL80211_FEATURE_AP_SCAN; 557 558 559 if (!ops->set_key) 560 wiphy->flags |= WIPHY_FLAG_IBSS_RSN; 561 562 wiphy->bss_priv_size = sizeof(struct ieee80211_bss); 563 564 local = wiphy_priv(wiphy); 565 566 local->hw.wiphy = wiphy; 567 568 local->hw.priv = (char *)local + ALIGN(sizeof(*local), NETDEV_ALIGN); 569 570 local->ops = ops; 571 local->use_chanctx = use_chanctx; 572 573 /* set up some defaults */ 574 local->hw.queues = 1; 575 local->hw.max_rates = 1; 576 local->hw.max_report_rates = 0; 577 local->hw.max_rx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 578 local->hw.max_tx_aggregation_subframes = IEEE80211_MAX_AMPDU_BUF; 579 local->hw.offchannel_tx_hw_queue = IEEE80211_INVAL_HW_QUEUE; 580 local->hw.conf.long_frame_max_tx_count = wiphy->retry_long; 581 local->hw.conf.short_frame_max_tx_count = wiphy->retry_short; 582 local->hw.radiotap_mcs_details = IEEE80211_RADIOTAP_MCS_HAVE_MCS | 583 IEEE80211_RADIOTAP_MCS_HAVE_GI | 584 IEEE80211_RADIOTAP_MCS_HAVE_BW; 585 local->hw.radiotap_vht_details = IEEE80211_RADIOTAP_VHT_KNOWN_GI | 586 IEEE80211_RADIOTAP_VHT_KNOWN_BANDWIDTH; 587 local->hw.uapsd_queues = IEEE80211_DEFAULT_UAPSD_QUEUES; 588 local->hw.uapsd_max_sp_len = IEEE80211_DEFAULT_MAX_SP_LEN; 589 local->user_power_level = IEEE80211_UNSET_POWER_LEVEL; 590 wiphy->ht_capa_mod_mask = &mac80211_ht_capa_mod_mask; 591 wiphy->vht_capa_mod_mask = &mac80211_vht_capa_mod_mask; 592 593 INIT_LIST_HEAD(&local->interfaces); 594 595 __hw_addr_init(&local->mc_list); 596 597 mutex_init(&local->iflist_mtx); 598 mutex_init(&local->mtx); 599 600 mutex_init(&local->key_mtx); 601 spin_lock_init(&local->filter_lock); 602 spin_lock_init(&local->rx_path_lock); 603 spin_lock_init(&local->queue_stop_reason_lock); 604 605 INIT_LIST_HEAD(&local->chanctx_list); 606 mutex_init(&local->chanctx_mtx); 607 608 INIT_DELAYED_WORK(&local->scan_work, ieee80211_scan_work); 609 610 INIT_WORK(&local->restart_work, ieee80211_restart_work); 611 612 INIT_WORK(&local->radar_detected_work, 613 ieee80211_dfs_radar_detected_work); 614 615 INIT_WORK(&local->reconfig_filter, ieee80211_reconfig_filter); 616 local->smps_mode = IEEE80211_SMPS_OFF; 617 618 INIT_WORK(&local->dynamic_ps_enable_work, 619 ieee80211_dynamic_ps_enable_work); 620 INIT_WORK(&local->dynamic_ps_disable_work, 621 ieee80211_dynamic_ps_disable_work); 622 setup_timer(&local->dynamic_ps_timer, 623 ieee80211_dynamic_ps_timer, (unsigned long) local); 624 625 INIT_WORK(&local->sched_scan_stopped_work, 626 ieee80211_sched_scan_stopped_work); 627 628 spin_lock_init(&local->ack_status_lock); 629 idr_init(&local->ack_status_frames); 630 631 sta_info_init(local); 632 633 for (i = 0; i < IEEE80211_MAX_QUEUES; i++) { 634 skb_queue_head_init(&local->pending[i]); 635 atomic_set(&local->agg_queue_stop[i], 0); 636 } 637 tasklet_init(&local->tx_pending_tasklet, ieee80211_tx_pending, 638 (unsigned long)local); 639 640 tasklet_init(&local->tasklet, 641 ieee80211_tasklet_handler, 642 (unsigned long) local); 643 644 skb_queue_head_init(&local->skb_queue); 645 skb_queue_head_init(&local->skb_queue_unreliable); 646 647 ieee80211_led_names(local); 648 649 ieee80211_roc_setup(local); 650 651 return &local->hw; 652 } 653 EXPORT_SYMBOL(ieee80211_alloc_hw); 654 655 static int ieee80211_init_cipher_suites(struct ieee80211_local *local) 656 { 657 bool have_wep = !(IS_ERR(local->wep_tx_tfm) || 658 IS_ERR(local->wep_rx_tfm)); 659 bool have_mfp = local->hw.flags & IEEE80211_HW_MFP_CAPABLE; 660 const struct ieee80211_cipher_scheme *cs = local->hw.cipher_schemes; 661 int n_suites = 0, r = 0, w = 0; 662 u32 *suites; 663 static const u32 cipher_suites[] = { 664 /* keep WEP first, it may be removed below */ 665 WLAN_CIPHER_SUITE_WEP40, 666 WLAN_CIPHER_SUITE_WEP104, 667 WLAN_CIPHER_SUITE_TKIP, 668 WLAN_CIPHER_SUITE_CCMP, 669 670 /* keep last -- depends on hw flags! */ 671 WLAN_CIPHER_SUITE_AES_CMAC 672 }; 673 674 /* Driver specifies the ciphers, we have nothing to do... */ 675 if (local->hw.wiphy->cipher_suites && have_wep) 676 return 0; 677 678 /* Set up cipher suites if driver relies on mac80211 cipher defs */ 679 if (!local->hw.wiphy->cipher_suites && !cs) { 680 local->hw.wiphy->cipher_suites = cipher_suites; 681 local->hw.wiphy->n_cipher_suites = ARRAY_SIZE(cipher_suites); 682 683 if (!have_mfp) 684 local->hw.wiphy->n_cipher_suites--; 685 686 if (!have_wep) { 687 local->hw.wiphy->cipher_suites += 2; 688 local->hw.wiphy->n_cipher_suites -= 2; 689 } 690 691 return 0; 692 } 693 694 if (!local->hw.wiphy->cipher_suites) { 695 /* 696 * Driver specifies cipher schemes only 697 * We start counting ciphers defined by schemes, TKIP and CCMP 698 */ 699 n_suites = local->hw.n_cipher_schemes + 2; 700 701 /* check if we have WEP40 and WEP104 */ 702 if (have_wep) 703 n_suites += 2; 704 705 /* check if we have AES_CMAC */ 706 if (have_mfp) 707 n_suites++; 708 709 suites = kmalloc(sizeof(u32) * n_suites, GFP_KERNEL); 710 if (!suites) 711 return -ENOMEM; 712 713 suites[w++] = WLAN_CIPHER_SUITE_CCMP; 714 suites[w++] = WLAN_CIPHER_SUITE_TKIP; 715 716 if (have_wep) { 717 suites[w++] = WLAN_CIPHER_SUITE_WEP40; 718 suites[w++] = WLAN_CIPHER_SUITE_WEP104; 719 } 720 721 if (have_mfp) 722 suites[w++] = WLAN_CIPHER_SUITE_AES_CMAC; 723 724 for (r = 0; r < local->hw.n_cipher_schemes; r++) 725 suites[w++] = cs[r].cipher; 726 } else { 727 /* Driver provides cipher suites, but we need to exclude WEP */ 728 suites = kmemdup(local->hw.wiphy->cipher_suites, 729 sizeof(u32) * local->hw.wiphy->n_cipher_suites, 730 GFP_KERNEL); 731 if (!suites) 732 return -ENOMEM; 733 734 for (r = 0; r < local->hw.wiphy->n_cipher_suites; r++) { 735 u32 suite = local->hw.wiphy->cipher_suites[r]; 736 737 if (suite == WLAN_CIPHER_SUITE_WEP40 || 738 suite == WLAN_CIPHER_SUITE_WEP104) 739 continue; 740 suites[w++] = suite; 741 } 742 } 743 744 local->hw.wiphy->cipher_suites = suites; 745 local->hw.wiphy->n_cipher_suites = w; 746 local->wiphy_ciphers_allocated = true; 747 748 return 0; 749 } 750 751 int ieee80211_register_hw(struct ieee80211_hw *hw) 752 { 753 struct ieee80211_local *local = hw_to_local(hw); 754 int result, i; 755 enum ieee80211_band band; 756 int channels, max_bitrates; 757 bool supp_ht, supp_vht; 758 netdev_features_t feature_whitelist; 759 struct cfg80211_chan_def dflt_chandef = {}; 760 761 if (hw->flags & IEEE80211_HW_QUEUE_CONTROL && 762 (local->hw.offchannel_tx_hw_queue == IEEE80211_INVAL_HW_QUEUE || 763 local->hw.offchannel_tx_hw_queue >= local->hw.queues)) 764 return -EINVAL; 765 766 #ifdef CONFIG_PM 767 if (hw->wiphy->wowlan && (!local->ops->suspend || !local->ops->resume)) 768 return -EINVAL; 769 #endif 770 771 if (!local->use_chanctx) { 772 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 773 const struct ieee80211_iface_combination *comb; 774 775 comb = &local->hw.wiphy->iface_combinations[i]; 776 777 if (comb->num_different_channels > 1) 778 return -EINVAL; 779 } 780 } else { 781 /* 782 * WDS is currently prohibited when channel contexts are used 783 * because there's no clear definition of which channel WDS 784 * type interfaces use 785 */ 786 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_WDS)) 787 return -EINVAL; 788 789 /* DFS currently not supported with channel context drivers */ 790 for (i = 0; i < local->hw.wiphy->n_iface_combinations; i++) { 791 const struct ieee80211_iface_combination *comb; 792 793 comb = &local->hw.wiphy->iface_combinations[i]; 794 795 if (comb->radar_detect_widths) 796 return -EINVAL; 797 } 798 } 799 800 /* Only HW csum features are currently compatible with mac80211 */ 801 feature_whitelist = NETIF_F_IP_CSUM | NETIF_F_IPV6_CSUM | 802 NETIF_F_HW_CSUM; 803 if (WARN_ON(hw->netdev_features & ~feature_whitelist)) 804 return -EINVAL; 805 806 if (hw->max_report_rates == 0) 807 hw->max_report_rates = hw->max_rates; 808 809 local->rx_chains = 1; 810 811 /* 812 * generic code guarantees at least one band, 813 * set this very early because much code assumes 814 * that hw.conf.channel is assigned 815 */ 816 channels = 0; 817 max_bitrates = 0; 818 supp_ht = false; 819 supp_vht = false; 820 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 821 struct ieee80211_supported_band *sband; 822 823 sband = local->hw.wiphy->bands[band]; 824 if (!sband) 825 continue; 826 827 if (!dflt_chandef.chan) { 828 cfg80211_chandef_create(&dflt_chandef, 829 &sband->channels[0], 830 NL80211_CHAN_NO_HT); 831 /* init channel we're on */ 832 if (!local->use_chanctx && !local->_oper_chandef.chan) { 833 local->hw.conf.chandef = dflt_chandef; 834 local->_oper_chandef = dflt_chandef; 835 } 836 local->monitor_chandef = dflt_chandef; 837 } 838 839 channels += sband->n_channels; 840 841 if (max_bitrates < sband->n_bitrates) 842 max_bitrates = sband->n_bitrates; 843 supp_ht = supp_ht || sband->ht_cap.ht_supported; 844 supp_vht = supp_vht || sband->vht_cap.vht_supported; 845 846 if (sband->ht_cap.ht_supported) 847 local->rx_chains = 848 max(ieee80211_mcs_to_chains(&sband->ht_cap.mcs), 849 local->rx_chains); 850 851 /* TODO: consider VHT for RX chains, hopefully it's the same */ 852 } 853 854 /* if low-level driver supports AP, we also support VLAN */ 855 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_AP)) { 856 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_AP_VLAN); 857 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_AP_VLAN); 858 } 859 860 /* mac80211 always supports monitor */ 861 hw->wiphy->interface_modes |= BIT(NL80211_IFTYPE_MONITOR); 862 hw->wiphy->software_iftypes |= BIT(NL80211_IFTYPE_MONITOR); 863 864 /* mac80211 doesn't support more than one IBSS interface right now */ 865 for (i = 0; i < hw->wiphy->n_iface_combinations; i++) { 866 const struct ieee80211_iface_combination *c; 867 int j; 868 869 c = &hw->wiphy->iface_combinations[i]; 870 871 for (j = 0; j < c->n_limits; j++) 872 if ((c->limits[j].types & BIT(NL80211_IFTYPE_ADHOC)) && 873 c->limits[j].max > 1) 874 return -EINVAL; 875 } 876 877 local->int_scan_req = kzalloc(sizeof(*local->int_scan_req) + 878 sizeof(void *) * channels, GFP_KERNEL); 879 if (!local->int_scan_req) 880 return -ENOMEM; 881 882 for (band = 0; band < IEEE80211_NUM_BANDS; band++) { 883 if (!local->hw.wiphy->bands[band]) 884 continue; 885 local->int_scan_req->rates[band] = (u32) -1; 886 } 887 888 #ifndef CONFIG_MAC80211_MESH 889 /* mesh depends on Kconfig, but drivers should set it if they want */ 890 local->hw.wiphy->interface_modes &= ~BIT(NL80211_IFTYPE_MESH_POINT); 891 #endif 892 893 /* if the underlying driver supports mesh, mac80211 will (at least) 894 * provide routing of mesh authentication frames to userspace */ 895 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_MESH_POINT)) 896 local->hw.wiphy->flags |= WIPHY_FLAG_MESH_AUTH; 897 898 /* mac80211 supports control port protocol changing */ 899 local->hw.wiphy->flags |= WIPHY_FLAG_CONTROL_PORT_PROTOCOL; 900 901 if (local->hw.flags & IEEE80211_HW_SIGNAL_DBM) { 902 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_MBM; 903 } else if (local->hw.flags & IEEE80211_HW_SIGNAL_UNSPEC) { 904 local->hw.wiphy->signal_type = CFG80211_SIGNAL_TYPE_UNSPEC; 905 if (hw->max_signal <= 0) { 906 result = -EINVAL; 907 goto fail_wiphy_register; 908 } 909 } 910 911 WARN((local->hw.flags & IEEE80211_HW_SUPPORTS_UAPSD) 912 && (local->hw.flags & IEEE80211_HW_PS_NULLFUNC_STACK), 913 "U-APSD not supported with HW_PS_NULLFUNC_STACK\n"); 914 915 /* 916 * Calculate scan IE length -- we need this to alloc 917 * memory and to subtract from the driver limit. It 918 * includes the DS Params, (extended) supported rates, and HT 919 * information -- SSID is the driver's responsibility. 920 */ 921 local->scan_ies_len = 4 + max_bitrates /* (ext) supp rates */ + 922 3 /* DS Params */; 923 if (supp_ht) 924 local->scan_ies_len += 2 + sizeof(struct ieee80211_ht_cap); 925 926 if (supp_vht) 927 local->scan_ies_len += 928 2 + sizeof(struct ieee80211_vht_cap); 929 930 if (!local->ops->hw_scan) { 931 /* For hw_scan, driver needs to set these up. */ 932 local->hw.wiphy->max_scan_ssids = 4; 933 local->hw.wiphy->max_scan_ie_len = IEEE80211_MAX_DATA_LEN; 934 } 935 936 /* 937 * If the driver supports any scan IEs, then assume the 938 * limit includes the IEs mac80211 will add, otherwise 939 * leave it at zero and let the driver sort it out; we 940 * still pass our IEs to the driver but userspace will 941 * not be allowed to in that case. 942 */ 943 if (local->hw.wiphy->max_scan_ie_len) 944 local->hw.wiphy->max_scan_ie_len -= local->scan_ies_len; 945 946 WARN_ON(!ieee80211_cs_list_valid(local->hw.cipher_schemes, 947 local->hw.n_cipher_schemes)); 948 949 result = ieee80211_init_cipher_suites(local); 950 if (result < 0) 951 goto fail_wiphy_register; 952 953 if (!local->ops->remain_on_channel) 954 local->hw.wiphy->max_remain_on_channel_duration = 5000; 955 956 /* mac80211 based drivers don't support internal TDLS setup */ 957 if (local->hw.wiphy->flags & WIPHY_FLAG_SUPPORTS_TDLS) 958 local->hw.wiphy->flags |= WIPHY_FLAG_TDLS_EXTERNAL_SETUP; 959 960 local->hw.wiphy->max_num_csa_counters = IEEE80211_MAX_CSA_COUNTERS_NUM; 961 962 result = wiphy_register(local->hw.wiphy); 963 if (result < 0) 964 goto fail_wiphy_register; 965 966 /* 967 * We use the number of queues for feature tests (QoS, HT) internally 968 * so restrict them appropriately. 969 */ 970 if (hw->queues > IEEE80211_MAX_QUEUES) 971 hw->queues = IEEE80211_MAX_QUEUES; 972 973 local->workqueue = 974 alloc_ordered_workqueue("%s", 0, wiphy_name(local->hw.wiphy)); 975 if (!local->workqueue) { 976 result = -ENOMEM; 977 goto fail_workqueue; 978 } 979 980 /* 981 * The hardware needs headroom for sending the frame, 982 * and we need some headroom for passing the frame to monitor 983 * interfaces, but never both at the same time. 984 */ 985 local->tx_headroom = max_t(unsigned int , local->hw.extra_tx_headroom, 986 IEEE80211_TX_STATUS_HEADROOM); 987 988 debugfs_hw_add(local); 989 990 /* 991 * if the driver doesn't specify a max listen interval we 992 * use 5 which should be a safe default 993 */ 994 if (local->hw.max_listen_interval == 0) 995 local->hw.max_listen_interval = 5; 996 997 local->hw.conf.listen_interval = local->hw.max_listen_interval; 998 999 local->dynamic_ps_forced_timeout = -1; 1000 1001 result = ieee80211_wep_init(local); 1002 if (result < 0) 1003 wiphy_debug(local->hw.wiphy, "Failed to initialize wep: %d\n", 1004 result); 1005 1006 local->hw.conf.flags = IEEE80211_CONF_IDLE; 1007 1008 ieee80211_led_init(local); 1009 1010 rtnl_lock(); 1011 1012 result = ieee80211_init_rate_ctrl_alg(local, 1013 hw->rate_control_algorithm); 1014 if (result < 0) { 1015 wiphy_debug(local->hw.wiphy, 1016 "Failed to initialize rate control algorithm\n"); 1017 goto fail_rate; 1018 } 1019 1020 /* add one default STA interface if supported */ 1021 if (local->hw.wiphy->interface_modes & BIT(NL80211_IFTYPE_STATION)) { 1022 result = ieee80211_if_add(local, "wlan%d", NULL, 1023 NL80211_IFTYPE_STATION, NULL); 1024 if (result) 1025 wiphy_warn(local->hw.wiphy, 1026 "Failed to add default virtual iface\n"); 1027 } 1028 1029 rtnl_unlock(); 1030 1031 local->network_latency_notifier.notifier_call = 1032 ieee80211_max_network_latency; 1033 result = pm_qos_add_notifier(PM_QOS_NETWORK_LATENCY, 1034 &local->network_latency_notifier); 1035 if (result) { 1036 rtnl_lock(); 1037 goto fail_pm_qos; 1038 } 1039 1040 #ifdef CONFIG_INET 1041 local->ifa_notifier.notifier_call = ieee80211_ifa_changed; 1042 result = register_inetaddr_notifier(&local->ifa_notifier); 1043 if (result) 1044 goto fail_ifa; 1045 #endif 1046 1047 #if IS_ENABLED(CONFIG_IPV6) 1048 local->ifa6_notifier.notifier_call = ieee80211_ifa6_changed; 1049 result = register_inet6addr_notifier(&local->ifa6_notifier); 1050 if (result) 1051 goto fail_ifa6; 1052 #endif 1053 1054 return 0; 1055 1056 #if IS_ENABLED(CONFIG_IPV6) 1057 fail_ifa6: 1058 #ifdef CONFIG_INET 1059 unregister_inetaddr_notifier(&local->ifa_notifier); 1060 #endif 1061 #endif 1062 #if defined(CONFIG_INET) || defined(CONFIG_IPV6) 1063 fail_ifa: 1064 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1065 &local->network_latency_notifier); 1066 rtnl_lock(); 1067 #endif 1068 fail_pm_qos: 1069 ieee80211_led_exit(local); 1070 ieee80211_remove_interfaces(local); 1071 fail_rate: 1072 rtnl_unlock(); 1073 ieee80211_wep_free(local); 1074 sta_info_stop(local); 1075 destroy_workqueue(local->workqueue); 1076 fail_workqueue: 1077 wiphy_unregister(local->hw.wiphy); 1078 fail_wiphy_register: 1079 if (local->wiphy_ciphers_allocated) 1080 kfree(local->hw.wiphy->cipher_suites); 1081 kfree(local->int_scan_req); 1082 return result; 1083 } 1084 EXPORT_SYMBOL(ieee80211_register_hw); 1085 1086 void ieee80211_napi_add(struct ieee80211_hw *hw, struct napi_struct *napi, 1087 struct net_device *napi_dev, 1088 int (*poll)(struct napi_struct *, int), 1089 int weight) 1090 { 1091 struct ieee80211_local *local = hw_to_local(hw); 1092 1093 netif_napi_add(napi_dev, napi, poll, weight); 1094 local->napi = napi; 1095 } 1096 EXPORT_SYMBOL_GPL(ieee80211_napi_add); 1097 1098 void ieee80211_unregister_hw(struct ieee80211_hw *hw) 1099 { 1100 struct ieee80211_local *local = hw_to_local(hw); 1101 1102 tasklet_kill(&local->tx_pending_tasklet); 1103 tasklet_kill(&local->tasklet); 1104 1105 pm_qos_remove_notifier(PM_QOS_NETWORK_LATENCY, 1106 &local->network_latency_notifier); 1107 #ifdef CONFIG_INET 1108 unregister_inetaddr_notifier(&local->ifa_notifier); 1109 #endif 1110 #if IS_ENABLED(CONFIG_IPV6) 1111 unregister_inet6addr_notifier(&local->ifa6_notifier); 1112 #endif 1113 1114 rtnl_lock(); 1115 1116 /* 1117 * At this point, interface list manipulations are fine 1118 * because the driver cannot be handing us frames any 1119 * more and the tasklet is killed. 1120 */ 1121 ieee80211_remove_interfaces(local); 1122 1123 rtnl_unlock(); 1124 1125 cancel_work_sync(&local->restart_work); 1126 cancel_work_sync(&local->reconfig_filter); 1127 flush_work(&local->sched_scan_stopped_work); 1128 1129 ieee80211_clear_tx_pending(local); 1130 rate_control_deinitialize(local); 1131 1132 if (skb_queue_len(&local->skb_queue) || 1133 skb_queue_len(&local->skb_queue_unreliable)) 1134 wiphy_warn(local->hw.wiphy, "skb_queue not empty\n"); 1135 skb_queue_purge(&local->skb_queue); 1136 skb_queue_purge(&local->skb_queue_unreliable); 1137 1138 destroy_workqueue(local->workqueue); 1139 wiphy_unregister(local->hw.wiphy); 1140 sta_info_stop(local); 1141 ieee80211_wep_free(local); 1142 ieee80211_led_exit(local); 1143 kfree(local->int_scan_req); 1144 } 1145 EXPORT_SYMBOL(ieee80211_unregister_hw); 1146 1147 static int ieee80211_free_ack_frame(int id, void *p, void *data) 1148 { 1149 WARN_ONCE(1, "Have pending ack frames!\n"); 1150 kfree_skb(p); 1151 return 0; 1152 } 1153 1154 void ieee80211_free_hw(struct ieee80211_hw *hw) 1155 { 1156 struct ieee80211_local *local = hw_to_local(hw); 1157 1158 mutex_destroy(&local->iflist_mtx); 1159 mutex_destroy(&local->mtx); 1160 1161 if (local->wiphy_ciphers_allocated) 1162 kfree(local->hw.wiphy->cipher_suites); 1163 1164 idr_for_each(&local->ack_status_frames, 1165 ieee80211_free_ack_frame, NULL); 1166 idr_destroy(&local->ack_status_frames); 1167 1168 kfree(rcu_access_pointer(local->tx_latency)); 1169 1170 wiphy_free(local->hw.wiphy); 1171 } 1172 EXPORT_SYMBOL(ieee80211_free_hw); 1173 1174 static int __init ieee80211_init(void) 1175 { 1176 struct sk_buff *skb; 1177 int ret; 1178 1179 BUILD_BUG_ON(sizeof(struct ieee80211_tx_info) > sizeof(skb->cb)); 1180 BUILD_BUG_ON(offsetof(struct ieee80211_tx_info, driver_data) + 1181 IEEE80211_TX_INFO_DRIVER_DATA_SIZE > sizeof(skb->cb)); 1182 1183 ret = rc80211_minstrel_init(); 1184 if (ret) 1185 return ret; 1186 1187 ret = rc80211_minstrel_ht_init(); 1188 if (ret) 1189 goto err_minstrel; 1190 1191 ret = ieee80211_iface_init(); 1192 if (ret) 1193 goto err_netdev; 1194 1195 return 0; 1196 err_netdev: 1197 rc80211_minstrel_ht_exit(); 1198 err_minstrel: 1199 rc80211_minstrel_exit(); 1200 1201 return ret; 1202 } 1203 1204 static void __exit ieee80211_exit(void) 1205 { 1206 rc80211_minstrel_ht_exit(); 1207 rc80211_minstrel_exit(); 1208 1209 ieee80211s_stop(); 1210 1211 ieee80211_iface_exit(); 1212 1213 rcu_barrier(); 1214 } 1215 1216 1217 subsys_initcall(ieee80211_init); 1218 module_exit(ieee80211_exit); 1219 1220 MODULE_DESCRIPTION("IEEE 802.11 subsystem"); 1221 MODULE_LICENSE("GPL"); 1222